3.A Handbook for Weed Control in Rice by Kwesi Ampong-Nyarko, Surajit K. De Datta (1991)"In general, herbicides are applied at preplanting, preemergence, or postemergence.
preplanting herbicide application A preplanting herbicide application is ..."

4.Labor in the Rural Household Economy of the Zairian Basin by Tshikala B. Tshibaka (1992)"The elasticity estimate of the share of household labor allocated to agriculture
with respect to the preplanting farmgate terms of trade is 0.27, ..."

5.Azolla Utilization: Proceedings of the Workshop on Azolla Use, Fuzhou by International Rice Research Institute, Fujian Academy of Agricultural Sciences (1987)"A. filiculoides is especially suited for preplanting incorporation because of
its high C and N ... Effect on rice: preplanting monocrop Research by ..."

6.Population, Land Use, And Environment: Research Directions by Barbara Entwisle, Paul C. Stern (2005)"Today the most common agronomic practice for wheat production in the valley is
a preplanting broadcast application of urea or injection of anhydrous ..."

7.Tissue Culture: Plants : A Bibliography, January 1991-April 1993. by Henry Gilbert (1994)"The effect of preplanting cultural practices on vegetative growth diminished in
... Flowering began in 1985 and was only slightly affected by preplanting ..."